Red Hat Product Errata RHSA-2026:27862 - Security Advisory
Issued:
2026-06-22
Updated:
2026-06-22

RHSA-2026:27862 - Security Advisory

Synopsis

Important: memcached security update

Type/Severity

Security Advisory: Important

Red Hat Lightspeed patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for memcached is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.

Security Fix(es):

  • memcached: memcached: Username enumeration via timing side channel (CVE-2026-47783)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

  • Red Hat Enterprise Linux for x86_64 9 x86_64
  • Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 9 s390x
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8 s390x
  • Red Hat Enterprise Linux for Power, little endian 9 ppc64le
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8 ppc64le
  • Red Hat Enterprise Linux for ARM 64 9 aarch64
  • Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8 aarch64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8 x86_64
  • Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8 aarch64
  • Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8 s390x
  • Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8 x86_64
  • Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.8 aarch64
  • Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.8 ppc64le
  • Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.8 s390x

Fixes

  • BZ - 2480089 - CVE-2026-47783 memcached: memcached: Username enumeration via timing side channel

Red Hat Enterprise Linux for x86_64 9

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
x86_64
memcached-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 24d944c8817128c86fe21928a43c6f5656151c0bda153a06d6371e4875366fa6
memcached-debuginfo-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: bfd5c6d368ec402742ca4f11f7b3386df393b2dd17f5208b6ff2c8811696999b
memcached-debugsource-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 26f51763d3adfcf0ea0f30149702550b0b7da60479957da141b478e2907163fe
memcached-selinux-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 2afec1704bc0c39875a33ff702b83767f30bf70c260e90b0ad2a0ed08d5c1e8d

Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
x86_64
memcached-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 24d944c8817128c86fe21928a43c6f5656151c0bda153a06d6371e4875366fa6
memcached-debuginfo-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: bfd5c6d368ec402742ca4f11f7b3386df393b2dd17f5208b6ff2c8811696999b
memcached-debugsource-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 26f51763d3adfcf0ea0f30149702550b0b7da60479957da141b478e2907163fe
memcached-selinux-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 2afec1704bc0c39875a33ff702b83767f30bf70c260e90b0ad2a0ed08d5c1e8d

Red Hat Enterprise Linux for IBM z Systems 9

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
s390x
memcached-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 0876bdbe303cd02ce8acb5d410113d46909237bc24ae5277be1b49a38a3addc1
memcached-debuginfo-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 089de5567c6b92012df19e94fe1d4a02da311b66f98e4f22ba6353ee3282ab3c
memcached-debugsource-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 844286e17052248cffd6c180f706b89e65baa8ebb40395f03802f488546c9813
memcached-selinux-1.6.9-7.el9_8.1.s390x.rpm SHA-256: f3aad7224e7ffc95d31d67aea9b66f2f7691ecfcb4b25980c3f31a6e6851d4ef

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
s390x
memcached-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 0876bdbe303cd02ce8acb5d410113d46909237bc24ae5277be1b49a38a3addc1
memcached-debuginfo-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 089de5567c6b92012df19e94fe1d4a02da311b66f98e4f22ba6353ee3282ab3c
memcached-debugsource-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 844286e17052248cffd6c180f706b89e65baa8ebb40395f03802f488546c9813
memcached-selinux-1.6.9-7.el9_8.1.s390x.rpm SHA-256: f3aad7224e7ffc95d31d67aea9b66f2f7691ecfcb4b25980c3f31a6e6851d4ef

Red Hat Enterprise Linux for Power, little endian 9

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
ppc64le
memcached-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fc0ec31d567b197b7592e5c65803fa359e7e104f75a2857198cb16e9b2311432
memcached-debuginfo-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 9ba8ed746400dbd8849642fb3e039c623c5dead2da0937b4f89bbc0b8beb838c
memcached-debugsource-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 735ea821069fda51ca79c2772390f31bb2392fe0880cc2ce5dee919835f892a1
memcached-selinux-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fece5ad5ebc454955a39f2ee938930e543447efb990caf5bb36732a8b4396295

Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
ppc64le
memcached-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fc0ec31d567b197b7592e5c65803fa359e7e104f75a2857198cb16e9b2311432
memcached-debuginfo-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 9ba8ed746400dbd8849642fb3e039c623c5dead2da0937b4f89bbc0b8beb838c
memcached-debugsource-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 735ea821069fda51ca79c2772390f31bb2392fe0880cc2ce5dee919835f892a1
memcached-selinux-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fece5ad5ebc454955a39f2ee938930e543447efb990caf5bb36732a8b4396295

Red Hat Enterprise Linux for ARM 64 9

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
aarch64
memcached-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 63b4bd05264b82a25a2c6732817d0c22d0c736e642fa049ee08d681ca8679797
memcached-debuginfo-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 125d8ab95befb69c956b25b9234538425d225a15fd8589ffd910f94e612bc2e4
memcached-debugsource-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: a6338f0c9622f0d46ead93870d2c1c9885c8163726ccbc003df27450232645fb
memcached-selinux-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: b5fc680740b8af61652acb37eded53b613b8c391db200476eddf9be88b7ea368

Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
aarch64
memcached-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 63b4bd05264b82a25a2c6732817d0c22d0c736e642fa049ee08d681ca8679797
memcached-debuginfo-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 125d8ab95befb69c956b25b9234538425d225a15fd8589ffd910f94e612bc2e4
memcached-debugsource-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: a6338f0c9622f0d46ead93870d2c1c9885c8163726ccbc003df27450232645fb
memcached-selinux-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: b5fc680740b8af61652acb37eded53b613b8c391db200476eddf9be88b7ea368

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
ppc64le
memcached-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fc0ec31d567b197b7592e5c65803fa359e7e104f75a2857198cb16e9b2311432
memcached-debuginfo-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 9ba8ed746400dbd8849642fb3e039c623c5dead2da0937b4f89bbc0b8beb838c
memcached-debugsource-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 735ea821069fda51ca79c2772390f31bb2392fe0880cc2ce5dee919835f892a1
memcached-selinux-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fece5ad5ebc454955a39f2ee938930e543447efb990caf5bb36732a8b4396295

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
x86_64
memcached-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 24d944c8817128c86fe21928a43c6f5656151c0bda153a06d6371e4875366fa6
memcached-debuginfo-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: bfd5c6d368ec402742ca4f11f7b3386df393b2dd17f5208b6ff2c8811696999b
memcached-debugsource-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 26f51763d3adfcf0ea0f30149702550b0b7da60479957da141b478e2907163fe
memcached-selinux-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 2afec1704bc0c39875a33ff702b83767f30bf70c260e90b0ad2a0ed08d5c1e8d

Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
aarch64
memcached-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 63b4bd05264b82a25a2c6732817d0c22d0c736e642fa049ee08d681ca8679797
memcached-debuginfo-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 125d8ab95befb69c956b25b9234538425d225a15fd8589ffd910f94e612bc2e4
memcached-debugsource-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: a6338f0c9622f0d46ead93870d2c1c9885c8163726ccbc003df27450232645fb
memcached-selinux-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: b5fc680740b8af61652acb37eded53b613b8c391db200476eddf9be88b7ea368

Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
s390x
memcached-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 0876bdbe303cd02ce8acb5d410113d46909237bc24ae5277be1b49a38a3addc1
memcached-debuginfo-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 089de5567c6b92012df19e94fe1d4a02da311b66f98e4f22ba6353ee3282ab3c
memcached-debugsource-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 844286e17052248cffd6c180f706b89e65baa8ebb40395f03802f488546c9813
memcached-selinux-1.6.9-7.el9_8.1.s390x.rpm SHA-256: f3aad7224e7ffc95d31d67aea9b66f2f7691ecfcb4b25980c3f31a6e6851d4ef

Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
x86_64
memcached-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 24d944c8817128c86fe21928a43c6f5656151c0bda153a06d6371e4875366fa6
memcached-debuginfo-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: bfd5c6d368ec402742ca4f11f7b3386df393b2dd17f5208b6ff2c8811696999b
memcached-debugsource-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 26f51763d3adfcf0ea0f30149702550b0b7da60479957da141b478e2907163fe
memcached-selinux-1.6.9-7.el9_8.1.x86_64.rpm SHA-256: 2afec1704bc0c39875a33ff702b83767f30bf70c260e90b0ad2a0ed08d5c1e8d

Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
aarch64
memcached-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 63b4bd05264b82a25a2c6732817d0c22d0c736e642fa049ee08d681ca8679797
memcached-debuginfo-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: 125d8ab95befb69c956b25b9234538425d225a15fd8589ffd910f94e612bc2e4
memcached-debugsource-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: a6338f0c9622f0d46ead93870d2c1c9885c8163726ccbc003df27450232645fb
memcached-selinux-1.6.9-7.el9_8.1.aarch64.rpm SHA-256: b5fc680740b8af61652acb37eded53b613b8c391db200476eddf9be88b7ea368

Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
ppc64le
memcached-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fc0ec31d567b197b7592e5c65803fa359e7e104f75a2857198cb16e9b2311432
memcached-debuginfo-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 9ba8ed746400dbd8849642fb3e039c623c5dead2da0937b4f89bbc0b8beb838c
memcached-debugsource-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: 735ea821069fda51ca79c2772390f31bb2392fe0880cc2ce5dee919835f892a1
memcached-selinux-1.6.9-7.el9_8.1.ppc64le.rpm SHA-256: fece5ad5ebc454955a39f2ee938930e543447efb990caf5bb36732a8b4396295

Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.8

SRPM
memcached-1.6.9-7.el9_8.1.src.rpm SHA-256: 5ceb3b5f184e1c3e0071f1b8cb6a9f4527b96cb0be77831ab078c5b3bb9a49ca
s390x
memcached-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 0876bdbe303cd02ce8acb5d410113d46909237bc24ae5277be1b49a38a3addc1
memcached-debuginfo-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 089de5567c6b92012df19e94fe1d4a02da311b66f98e4f22ba6353ee3282ab3c
memcached-debugsource-1.6.9-7.el9_8.1.s390x.rpm SHA-256: 844286e17052248cffd6c180f706b89e65baa8ebb40395f03802f488546c9813
memcached-selinux-1.6.9-7.el9_8.1.s390x.rpm SHA-256: f3aad7224e7ffc95d31d67aea9b66f2f7691ecfcb4b25980c3f31a6e6851d4ef

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